Mount Lofty Ranges Priority Areas (GIS shapefile)
URL: https://www.waterconnect.sa.gov.au/Content/Downloads/DEWNR/ADMIN_MLRWatershedPriorityAreas_shp.zip
Defines three areas/zones within the Mount Lofty Ranges Watershed based on water quality risk within the current Adelaide mains water supply system.
Priority Area 1 includes all catchments that drain to primary water supply reservoirs and diversion weirs (eg. Myponga reservoir, Clarendon weir, Gorge weir, Millbrook reservoir catchments). This area represents 29.54% of the entire Mt Lofty Ranges Water Protection Area. Activities and new developments in this area have the highest risk of polluting raw mains water supplies because there are no substantial on-stream barriers to trap pollutants prior to intakes into water filtration plants.
Priority Area 2 includes: land within 2km of secondary water supply reservoirs (eg. Mt Bold, Kangaroo Creek, South Para and Warren Reservoirs); land within 100m of the River Torrens and Onkaparinga Rivers below Mt Pleasant and Hahndorf respectively (ie. below where River Murray water is pumped and allowed to gravitate into downstream reservoirs); land subject to 1 in 100 year floods; all land in the Aldgate, Cox and Lenswood subcatchments (ie. subcatchments that generate more than 200mm rainfall equivalent runoff per year). These areas represents 15.75% of the entire Mt Lofty Ranges Water Protection Area. Activities and new development in these areas have a moderate risk of polluting raw mains water supplies even though they are located above major secondary reservoirs that can trap a substantial proportion of pollutants in most flow conditions.
Priority Area 3 incorporates all remaining parts of the Mt Lofty Ranges Water Protection Area and represent 54.70% of the entire Mt Lofty Ranges Water Protection Area. Activities and new developments in these areas have the lowest risk of polluting raw mains water supplies, but still present risks that need to be carefully considered and managed.
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Additional Information
| Last updated | 7 September 2023 |
|---|---|
| Created | 12 December 2016 |
| Format | SHP |
| License | Creative Commons Attribution |
